Prep 2008一道语法题

20082010

155. (26590-!-item-!-188;#058&001978)

Withsurface temperatures estimated at minus 230 degrees Fahrenheit, Jupiter's moon Europahas long been considered far too cold to support life, and with 60 squaremiles of water thought to be frozen from top to bottom.

A.Europa has long been considered far too cold to support life, and with

B.Europa has long been considered far too cold to support life, its

C.Europa has long been considered as far too cold to support life and has

D.Europa, long considered as far too cold to support life, and its

E.Europa, long considered to be far too cold to support life, and to have

答案选B
请问一下NN，Jupiter's moon Europahas long been considered far too cold to support life  和 its 60 squaremiles of water thought to be frozen from top to bottom属于两个分句，Its之前为什么不需要and?

非常感谢！

zxppx

事实上，its引导的只是一个形容词短语，不是完整的句子（因为后面没有谓语）。its指代Europahas

bejamin1111

亲，后半部分是独立主格结构做伴随状语。这个08上有非常详细的解释。参考112页。为什么不是完整句子呢？因为thought前面得有be动词才是完整句子，这时候就需要连词了。

20082010

非常谢谢！